111248139 has 4 divisors (see below), whose sum is σ = 148330856. Its totient is φ = 74165424.

The previous prime is 111248101. The next prime is 111248183. The reversal of 111248139 is 931842111.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 111248139 - 2²³ = 102859531 is a prime.

It is a super-2 number, since 2×111248139² = 24752296861926642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111248239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18541354 + ... + 18541359.

It is an arithmetic number, because the mean of its divisors is an integer number (37082714).

Almost surely, 2^111248139 is an apocalyptic number.

111248139 is a deficient number, since it is larger than the sum of its proper divisors (37082717).

111248139 is an equidigital number, since it uses as much as digits as its factorization.

111248139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37082716.

The product of its digits is 1728, while the sum is 30.

The square root of 111248139 is about 10547.4233346349. The cubic root of 111248139 is about 480.9474039968.

The spelling of 111248139 in words is "one hundred eleven million, two hundred forty-eight thousand, one hundred thirty-nine".